Ashton Kutcher’s contentious divorce with Demi Moore has now spiraled into a $10 million battle over his venture capital fund with Madonna’s manager Guy Oseary and billionaire Ron Burkle, Page Six can exclusively reveal.

Kutcher and Oseary earlier this month announced their fund A-Grade investments, set up to invest in tech start-ups, was valued at $100 million and they were raising money from outside investors.

But a source familiar with the proceedings between Kutcher and Moore, who split in November 2011, told us, “Ashton and Demi are still not divorced, and no settlement has been agreed, even though they have been in negotiations for over a year. Ashton made a lot of money after they married, but he doesn’t believe he owes her as much as she is asking for.”

Our source continued, “Ashton set up A-Grade with Oseary and Burkle in 2010, when he and Demi were still together, but he recently told her lawyers the fund had not made substantial money. In fact, he claimed he had only put about $1 million into it.

“Now it seems Ashton and Oseary were working towards a private offering based on a valuation of $100 million. Ashton owns 20 percent of the fund, under California law, Demi should be entitled to half of his share — $10 million.”

Kutcher and Oseary made their announcement at Techcrunch’s Disrupt NY conference in early May, a move that sources close to Demi describe as “audacious and narcissistic.” Companies their fund has invested in include Airbnb, Shazam, Path, Flipboard, Foursquare, Uber, Spotify, Fab.com and Soundcloud.

Kutcher, 35, is TV’s highest-paid actor for “Two and a Half Men,” which netted him $24 million between May 2011 and May 2012. The last major payday for Moore, 50, was $2 million for 2003’s “Charlie’s Angels: Full Throttle.” Kutcher is now dating Mila Kunis.

Kutcher’s rep didn’t get back to us. Moore’s lawyer William Beslow wouldn’t comment.